ITPEC IP October 2024 Question 14
Two (2) HDDs are connected to a server for storing data. When at least one (1) of the HDDs is working, stored data needs to be available. Which of the following is an appropriate configuration that should be used for the HDDs?
Explanation
Mirroring — writing the same data to both HDDs keeps it available as long as either disk works.
Mirroring (RAID 1) writes every piece of data to both disks, so each holds a complete copy. If one HDD fails, the server continues with the other and no data is lost. The price is capacity: two disks give the usable space of one.
Answer (d)
Why not others:
- •(a) Striping — (RAID 0) splits data into blocks spread across both disks for speed; each disk holds only part of the data, so losing either disk loses it
- •(b) Data mining — analysing large volumes of stored data to discover patterns; not a disk configuration
- •(c) Tethering — sharing a smartphone's mobile connection with a PC or other device; unrelated to storage
Key rule: Mirroring (RAID 1) duplicates data and survives the failure of one disk; striping (RAID 0) only improves speed and has no redundancy.
System Component · AI-written, may contain errors
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